Lesson Learned Achievements Here is the full list of all 24 Lesson Learned achievements.Filter Achievement View View Image viewList view Sort by Won first then by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc What are achievement flags? Click to find outApply AllWonNot wonFirst lessonComplete the tutorial. 11 October 2024 - Add a guidePrickerBuild your first Pricker. 11 October 2024 - Add a guideSecond lessonSurvive the first wave. Locked - Add a guideLucyDefeat Lucy. Locked - Add a guideTutankhamunDefeat Tutankhamun. Locked - Add a guideGaius Julius CaesarDefeat Gaius Julius Caesar. Locked - Add a guidePope Innocent IIIDefeat Pope Innocent III. Locked - Add a guideNapoleon BonaparteDefeat Napoleon Bonaparte. Locked - Add a guideBoomerBuild your first Boomer. Locked - Add a guideSpitterBuild your first Spitter. Locked - Add a guideTeslaBuild your first Tesla. Locked - Add a guideHammerBuild your first Hammer. Locked - Add a guideDragonBuild your first Dragon. Locked - Add a guideLevel UPLevel up your tower. Locked - Add a guideUpgradeBuy your first upgrade Locked - Add a guideFIrst gradeDefeat your first 10 monsters. Locked - Add a guideSecond gradeDefeat your first 50 monsters. Locked - Add a guideThird gradeDefeat your first 100 monsters. Locked - Add a guideFourth gradeDefeat your first 500 monsters. Locked - Add a guideFifth gradeDefeat your first 1000 monsters. Locked - Add a guideBuilder apprenticeBuild your first 10 towers. Locked - Add a guideBuilder journeymanBuild your first 50 towers. Locked - Add a guideBuilder masterBuild your first 100 towers. Locked - Add a guideWinston ChurchillDefeat Winston Churchill. Locked - Add a guide